A family of high-efficiency GE instant-start electronic linear fluorescent ballasts designed to optimise GE's T8 Ultra lamps for enhanced system energy savings. UltraMax ballasts have a low lamp current crest factor and virtually "read" and adapt to incoming voltage from 108V to 305V. Other features include UL Type CC Anti-Arc Rating and anti-striation control to eliminate lamp striations and spiraling. GE also has an UltraMax HID ballast which can operate PulseArc and CMH lamps anywhere from 250 watts to 400 watts and provides greatly improved lumen maintenance.